NTSB investigations: Pratt & Whitney PT6A series
37 cases on aircraft whose registry engine model is Pratt & Whitney PT6A series, where the first occurrence was “Loss of control - in flight”. Aircraft are matched to the registry by N-number and event date, checked against the reported serial number, make and model, so older matches can be wrong.
Cases per year
| 1991 | 1 |
|---|---|
| 1994 | 1 |
| 1995 | 1 |
| 1996 | 1 |
| 1998 | 2 |
| 2000 | 1 |
| 2001 | 4 |
| 2002 | 5 |
| 2003 | 9 |
| 2004 | 2 |
| 2005 | 4 |
| 2006 | 1 |
| 2007 | 5 |
Where
Open the mapLatest cases
Query with SQL
duckdb -csv -c "SELECT c.\"ntsbNumber\", c.\"eventDate\", c.\"eventType\", c.\"eventCity\", c.\"eventStateOrRegion\", a.n_number, a.\"aircraftMake\", a.\"aircraftModel\", c.\"highestInjuryLevel\", c.\"totalFatal\", c.\"completionStatus\", c.report_url
FROM 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c LEFT JOIN 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' a ON a.case_mkey = c.\"mKey\" AND a.position = 1
WHERE c.\"mKey\" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('52032', '52034')
AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_occurrences.parquet' o WHERE o.case_mkey = x.case_mkey AND o.aircrafts_position = x.position AND o.\"occurrenceNumber\" = 1 AND o.\"occurrenceCode\" = 250))
ORDER BY c.\"eventDate\" DESC, c.\"ntsbNumber\" DESC"Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.
SELECT c."ntsbNumber", c."eventDate", c."eventType", c."eventCity", c."eventStateOrRegion", a.n_number, a."aircraftMake", a."aircraftModel", c."highestInjuryLevel", c."totalFatal", c."completionStatus", c.report_url
FROM 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c LEFT JOIN 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' a ON a.case_mkey = c."mKey" AND a.position = 1
WHERE c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('52032', '52034')
AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_occurrences.parquet' o WHERE o.case_mkey = x.case_mkey AND o.aircrafts_position = x.position AND o."occurrenceNumber" = 1 AND o."occurrenceCode" = 250))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESCRun it at the DuckDB prompt, or in any tool that reads Parquet over HTTPS. More ways to query the release are on Use the data.
NTSB ANC08LA027Accident · Serious injuriesLimited investigationFinal reportCessna 208B · Bethel, AKThe pilot's failure to adequately remove frost contamination from the airplane, which resulted in a loss of control and subsequent collision with terrain during an emergency landing after takeoff.NTSB DFW08CA014Accident · No injuriesData collectionFinal reportAir Tractor 402B · Taft, TXThe pilot's failure to maintain control during takeoff. A contributing factor was the prevailing crosswind.NTSB SEA07LA242Accident · No injuriesLimited investigationFinal reportAir Tractor AT-502B · Blythe, CAThe pilot's failure to maintain adequate airspeed which resulted in a stall. A contributing factor was the high density altitude.NTSB NYC07FA065Accident · 3 fatalField investigationFinal reportSocata TBM 700 · Dartmouth, MABoth pilots' failure to maintain aircraft control during a missed approach.NTSB CHI07LA059Accident · Minor injuriesLimited investigationFinal reportCessna 425 · Harbor Springs, MIThe pilot's failure to maintain aircraft control and adequate airspeed during landing flare. Contributing to the accident was the aerodynamic stall/mush encountered at a low altitude.NTSB DEN07LA020Accident · 1 fatalLimited investigationFinal reportAir Tractor AT-502A · Deming, NMThe pilot's failure to maintain aircraft control while maneuvering resulting in an inadvertent stall and impact with terrain. A contributing factor was the low airspeed.NTSB CHI05CA245Accident · No injuriesData collectionFinal reportAir Tractor AT-502 · Hector, MNThe pilot's failure to achieve adequate airspeed on takeoff which resulted in the airplane entering a stall/mush when it flew out of ground effect while crossing a large drainage ditch on takeoff.NTSB DFW05CA191Accident · No injuriesData collectionFinal reportAir Tractor AT-502B · Gassoway, LAThe pilot's premature lift-off which resulted in an inadequate climb for terrain clearance. Also causal was the pilot's failure to abort the takeoff. A contributing factor was the high density altitude.NTSB LAX05LA203Accident · Serious injuriesLimited investigationFinal reportBeech C90 · Marble Canyon, AZthe pilot's failure to maintain an adequate airspeed while maneuvering during a go-around, which resulted in a stall.NTSB DFW05CA131Accident · No injuriesData collectionFinal reportAir Tractor AT-402A · Cherry Valley, ARThe pilot's failure to calculate take off-distance performance data, which resulted in insufficient runway length for take off. Factors were the tailwind and high gross weight.NTSB SEA05FA025Accident · 2 fatalField investigationFinal reportCessna 208B · Bellevue, IDThe pilot's failure to maintain aircraft control while on approach for landing in icing conditions. Inadequate airspeed was a factor.NTSB LAX04LA275Accident · No injuriesLimited investigationFinal reportAir Tractor AT-502B · Mendota, CAThe pilot's inadequate preflight/pretakeoff procedure by not lowering the wing flaps, which resulted in an inadvertent stall as the pilot attempted to climb out of ground effect to clear a corn crop at the end of the runway. A factor in the accident was the…NTSB NYC04LA050Accident · No injuriesLimited investigationFinal reportCessna 208B · Covington, KYThe pilot's inadequate pre-flight inspection, which resulted in a decrease in airplane performance due to ice, and a subsequent hard landing.NTSB NYC04LA044Accident · No injuriesLimited investigationFinal reportSocata TBM 700 · Reading, PAThe pilot's improper decision to not apply de-icing fluid to the wings prior to takeoff, which resulted in snow/ice contamination on the of the wings, a stall mush, and a forced landing in an open field.NTSB FTW03LA223Accident · 1 fatalLimited investigationFinal reportAir Tractor AT-502B · Farwell, TXThe pilot's failure to maintain airspeed while maneuvering which resulted in an inadvertent stall.NTSB NYC03MA183Accident · 2 fatalMajor investigationFinal reportBeech 1900D · Yarmouth, MAThe improper replacement of the forward elevator trim cable, and subsequent inadequate functional check of the maintenance performed, which resulted in a reversal of the elevator trim system and a loss of control in-flight. Factors were the flightcrew's…NTSB LAX03LA180Accident · Minor injuriesLimited investigationFinal reportAir Tractor AT-502A · Raywood, TXthe pilot's encounter with a stall/mush condition in the takeoff initial climb due to his inadequate preflight/pretakeoff procedures and failure to set the wing flaps to the proper takeoff configuration before beginning the takeoff ground roll.NTSB CHI03LA118Accident · 2 fatalLimited investigationFinal reportAir Tractor AT-503A · Pontiac, ILThe pilot's failure to maintain adequate airspeed which resulted in an inadvertent stall/spin. A factor associated with the accident was the low altitude maneuver.NTSB FTW03LA141Accident · No injuriesLimited investigationFinal reportAir Tractor AT-502B · Pond Creek, OKThe pilot's failure to attain adequate airspeed during liftoff resulting in a stall.NTSB IAD03FA035Accident · 3 fatalField investigationFinal reportSocata TBM 700 · Leesburg, VAThe pilot's failure to fly a stabilized, published instrument approach procedure, and his failure to maintain adequate airspeed which led to an aerodynamic stall.NTSB DCA03MA022Accident · 21 fatalClass 1 · MajorFinal reportBeech 1900D · Charlotte, NCthe airplane's loss of pitch control during take-off. The loss of pitch control resulted from the incorrect rigging of the elevator system compounded by the airplane's aft center of gravity, which was substaintially aft of the certified aft limit.…NTSB CHI03FA041Accident · 1 fatalField investigationFinal reportCessna 208B · Rockford, ILThe pilot's failure to maintain control of the airplane during the ILS approach. Factors associated with the accident were the low ceilings, high winds, crosswind, and wind shear conditions that existed.NTSB ATL03FA008Accident · 1 fatalField investigationFinal reportCessna 208B · Spanish Fort, ALthe pilot's spatial disorientation, which resulted in loss of airplane control. Contributing to the accident was the night instrument meteorological conditions with variable cloud layers.NTSB LAX02LA240Accident · Minor injuriesLimited investigationFinal reportAir Tractor AT-502 · San Manuel, AZthe pilot's failure to maintain adequate airspeed while maneuvering in a box canyon, which resulted in a stall/mush. A factor in the accident was downdraft conditions that led to an uncontrolled decent.NTSB LAX02FA108Accident · Serious injuriesField investigationFinal reportBeech E90 · Reno, NVThe pilot's inadequate approach airspeed for the existing adverse meteorological conditions followed by his delayed remedial action to avert stalling and subsequent loss of airplane control. Contributing factors were the pilot's reduced visibility due to the…NTSB FTW02LA086Accident · 1 fatalLimited investigationFinal reportAir Tractor AT-502B · Extension, LAThe pilot's failure to maintain aircraft control. A factor was the pilot's impairment due to drugs.NTSB FTW01LA147Accident · No injuriesLimited investigationFinal reportAir Tractor AT-502B · Newport, ARthe loss of control during takeoff initial climb as a result of encountering wake turbulence due to the pilot's failure to recognize the hazard and delay the takeoff.NTSB CHI01LA151Accident · 1 fatalLimited investigationFinal reportAir Tractor AT-402B · Mount Vernon, SDthe pilot not maintaining aircraft control while maneuvering close to the ground.NTSB DEN01FA094Accident · 1 fatalField investigationFinal reportCessna 208B · Steamboat Spngs, COan inadvertent stall during an instrument approach, which resulted in a loss of control. Contributing factors were the pilot's attention being diverted by an abnormal indication, conditions conducive to airframe icing, and the pilot's lack of total experience…NTSB DEN01FA075Accident · 1 fatalField investigationFinal reportSocata TBM 700 · Englewood, COthe pilot's spatial disorientation, which led to his failure to maintain aircraft control. A contributing factor was the pilot's decision to intentionally fly into known adverse weather that consisted of low ceilings, obscuration, and ice fog.NTSB CHI00LA177Accident · No injuriesLimited investigationFinal reportAir Tractor AT-502 · Portland, NDthe pilot intentionally operated the airplane with known damage on the left wing which resulted in the pilot's inability to maintain control of the airplane during takeoff.NTSB MIA98LA202Accident · No injuriesLimited investigationFinal reportAir Tractor 502 · Clewiston, FLThe pilot's failure to attain adequate airspeed. A tailwind was a contributing factor.NTSB FTW98FA100Accident · 1 fatalField investigationFinal reportAir Tractor 502B · Eudora, ARThe pilot's failure to maintain adequate airspeed while attempting an aerobatic manueverNTSB MIA96LA232Accident · 1 fatalLimited investigationFinal reportAir Tractor 402 · Slocomb, ALThe pilot's failure to maintain airspeed.NTSB CHI95LA278Accident · 1 fatalLimited investigationFinal reportAir Tractor AT-400 · Hayti, MOthe pilot inadvertently stalled the airplane. A factor was the reduced power setting.NTSB FTW94LA119Accident · Serious injuriesLimited investigationFinal reportCessna 208 · Whitewright, TXThe inadvertent stall when too many parachutist hung on the outside of the aircraft.NTSB CHI91DER07Accident · No injuriesFinal reportPiper PA-36-375 · Breckentidge, MNThe pilot's failure to take adequate remedial action during the attempted climb out. A related factor is the premature lift off.